I've started to build a Voight-Kampff machine (VK). As a conceptual start I've used Lego to give some hints on if I get the size and construction right.

I used LED arrays from Kingbright as input for the size. That was for the red 10 LED array and the green-red 12 LED array.
Compare the work done by @MarcusKirsch here: Voight Kampff Test - UK - german built

Other main references for my machine were the pictures on these forum pages:

I don't remember if it made it to the movie, but it gives some background.

Quote:

Deckard (Voice Over):
It was always a thrill running a Voight-Kampff on a known human being. All you get is 0-0-0.
Just to humor the big shot I ran 62 questions in the Omega series, 28 in the the Colman series.
And I was coming to the end of the Cumming cross reference when I got a cold chill down my spine.

I'm not sure if I got the terms "Omega", "Colman" and "Cumming" right...

You wonder what the thrill with a 0-0-0 result is, perhaps you don't expect it during the test.

The following dialogue we know as:

Quote:

Deckard: She's a replicant, isn't she?
Tyrell: I'm impressed. How many questions does it usually take to spot one?
Deckard: I don't get it Tyrell.
Tyrell: How many questions?
Deckard: Twenty, thirty, cross-referenced.
Tyrell: It took more than a hundred for Rachael, didn't it?

I'm comparing the screen clips used on the close-up shots (earlier post) with the lower machine used with the actors. This is about the best I can get, but they differ quite a bit:
They don't change much in the three clips (total 16s) during the Leon test.

Both smaller screens have a dark background.

The left small screen has some increasing animation on it.

The right small screen seems static.

The larger screen with the eye appear to be in black and white, and it only has slight movement.

I think I will stick with the close-up clips for my lower-version machine.

I also noted, while walking through the scene frame-by-frame, that Holden has his blaster in his hand for a few frames after he has been shot. That was new to me, and I wondered if this was known by the community. I found that Joberg posted that in 2009 here:
Blade Runner White Dragon Cut_________________No artificial animals were harmed in the production